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The sun, mass 2.0 X 10^30 kg, is revolving regarding the center of the Milky Way galaxy, which is 2.2 X 10^20 m away. It completes one revolution each 2.5 X 10^8 years. Estimate the number of stars in the Milky Way.
(Hint: Suppose for simplicity that the stars are distributed with spherical symmetry about the galactic center and that our sun is basically at the galactic edge)
Show that the average force exerted. What is your displacement after running 2.5 {rm km} on Strawberry Fields, 1.4 {rm km} on Penny Lane, and 4.2 {rm km} on Abbey Road.
A 30-60-90 prism has an index of refraction of n= 1.6. Light is normally incident on the left side of the prism, what is the angle of refraction with respect to the normal to the back surface
a hot-air balloon is open at the bottom. the balloon which has a volume of 214 m3 is filled with air that has an
Express how unmet basic physiological needs of oxygen, nutrition, temperature, and humidity threaten clients' safety.
An electron that has an energy of approximately 62 eV moves between rigid walls 1.4 nm apart. Find the quantum number n for the energy state that the electron occupies.
A stone has a mass of 9.00 x 10 ^-3 kg and is wedged into the tread of an automobile tire. The coefficient of static friction between the stone and each side of the tread channel is 0.70. determine the radius r of the tire
A microscope has an objective lens with a focal length of 16.22 mm and an eyepiece with a focal length of 9.20 mm. With the length of the barrel set at29.0 cm, the diameter of a red blood cells image subtends an angle of 1.43 mrad with the eye.
Consider a bright star in our night sky. Assume its distance from Earth is 89.4 light-years (ly) and its power output is 4.00 multiply.gif 1028W, Find the intensity of the starlight at the Earth
A point mass of m1 = 2.3 kg is placed at the origin. Masses m2 = 5.4 kg and m3 = 7.6 kg are placed at 3.5 m and -5.8 m on the x-axis, respectively. Find out the location on the x-axis of the center of mass.
In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Find the net power radiated by the person when in a room with temperature . Express the net radiated power numerically, to the nearest 10 W
In an experiment designed to measure the speed of light, a laser is aimed at a mirror that is 54.0 km due north. A detector is placed107 m due east of the laser. The mirror is to be aligned so that light from the laser refelects into the detector...
A bartender slides a beer mug at 1.6 m/s towards a customer at the end of a frictionless bar that is 1.6 m tall. What are the speed and direction of the mug at impact
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